. [A biological survey of the waters of Woods Hole and vicinity. Marine animals; Marine plants. BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 543. Pyramid Rock Chart 273.—Distribution of algae on Spindle Rocks, September 19, 1904. This chart is introduced to show variations that may be present in the algal life on the same rocks at the same season but in different years. It should be compared with chart 272, plotted September 2, 1905. The charts agree in having Ulva Lactuca var. rigida (5) as the conspicuous green alga on the tops of the rocks. There was no Chordaria flagelUformis this season
. [A biological survey of the waters of Woods Hole and vicinity. Marine animals; Marine plants. BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 543. Pyramid Rock Chart 273.—Distribution of algae on Spindle Rocks, September 19, 1904. This chart is introduced to show variations that may be present in the algal life on the same rocks at the same season but in different years. It should be compared with chart 272, plotted September 2, 1905. The charts agree in having Ulva Lactuca var. rigida (5) as the conspicuous green alga on the tops of the rocks. There was no Chordaria flagelUformis this season and consequently no zone of brown algse, although Scytosiphon lomeniarius (26) grew in scattered patches. Ncmalion muUifidum (40) formed a zone of thick growth above low-water mark (the dotted line) on rocks III, VII, VIII, and Pyramid Rock. The most conspicuous zone was below low water and composed of Ccramium rubrum (43) and Polysiphonia fibrillosa (46). The Polysiphonia fibrillosa, which was not present at all in 1905, this season took the place of Chordaria flagelUformis and Polysiphonia violacea (48), usually abundant, but scattered plants of the latter were present. Chondrus crisptcs, as usual, was abundant, extending into deeper water below the Polysiphonia. List of species: Ulva Lactuca var. rigida, 5, abundant; Scytosiphon lomentarius, 26, patches on rocks; Chorda filum, 31, large beds; Laminaria Agardhii, ;^;^, scattered patches; Fucus vesiculostis, 35, scattered plants, Sargassum Filipendula, 36, few plants; Ncmalion muUifidum, 40, abundant; Ccramium rubrum, 43, abundant; Polysiphonia fibrillosa, 46, very abundant, fringing rocks just below low-water; Polysi- phonia violacea, 48, few; Chondrus crispus, 49, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Sumner, Francis Bertody, 1874-;
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmarineanimals, bookye
